Refactor layout node classes to be RefCounted instead of sub-resources #25
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This PR refactors layout node classes (
DockableLayoutNode
,DockableLayoutPanel
andDockableLayoutSplit
) to inherit fromRefCounted
instead ofResource
. This makes all layout data concentrated in a single resource, avoiding sub-resources. Also, it doesn't make much sense for node classes to be standalone resources, they must live in a layout to be useful.For serialization to work, there is a new
serialized_data
property that serializes this tree to/from a Dictionary.Note: this is a breaking change, previously serialized
DockableLayout
resources will be reset, since the new data is not compatible with previous one.